[Bug c++/47952] [trans-mem] undefined reference to transaction clone

["patrick.marlier at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47952

--- Comment #11 from Patrick Marlier <patrick.marlier at gmail dot com> 2011-03-10 04:31:30 UTC ---
This issue has been filled here:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48021

There is also a reduced testcase. (If I remember well the namespace std
matters).

Patrick.
<http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48021>

On Thu, Mar 10, 2011 at 12:01 AM, rth at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47952
>
> --- Comment #10 from Richard Henderson <rth at gcc dot gnu.org> 2011-03-09
> 23:01:38 UTC ---
> The remaining problem in the full glob2 test is
>
>
> src/Unit.o: In function `transaction clone for Unit::~Unit()':
> Unit.cpp:(.text._ZGTtN4UnitD2Ev[transaction clone for Unit::~Unit()]+0x2c):
> undefined reference to `transaction clone for std::basic_string<char,
> std::char_traits<char>, std::allocator<char> >::~basic_string()'
> collect2: ld returned 1 exit status
>
>
> which really really doesn't exist.  No amount of marking this
> function weak is going to work.
>
> I suspect, but have not yet verified, that this is related to
>
>
>  // Inhibit implicit instantiations for required instantiations,
>  // which are defined via explicit instantiations elsewhere.
>  // NB: This syntax is a GNU extension.
> #if _GLIBCXX_EXTERN_TEMPLATE > 0
>  extern template class basic_string<char>;
>
>
> in that we're copying the "is extern" bit, which is not true for
> the transactional clone.
>
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